Joliet, IL Solar Panels
Solar Power in Joliet
Considering solar panel installation in Joliet, IL? Start by looking at your roof, household energy use, and how a solar system could fit your home. Illinois residential electricity prices increased 22% from 2020 to 2024, making it useful to understand your options.
Explore what goes into planning and installing a home solar system, and what questions to ask along the way. Read our guide to home solar panels to learn the basics.
How Much Do Solar Panels Cost in Joliet, IL?
Explore solar installation costs in Joliet using Palmetto’s database of real Illinois installations. This local estimate draws on firsthand project data from Joliet and nearby communities, including Shorewood, Plainfield, and Crest Hill, to help you understand what homeowners in the area may pay.
System
- No upfront investment
- Palmetto handles all maintenance
- 90% Production Guarantee
- Comprehensive protection program included
Key Takeaways
- Solar output in Joliet changes with the seasons as longer summer days boost production, while winter daylight, clouds, and snow can reduce it.
- A typical estimate varies by home and payment choice: the article shows $28,095 to buy a medium system or about $79 monthly to lease.
- Illinois offers several solar programs, but eligibility and savings depend on program rules, utility requirements, and the details of your agreement.
Joliet Electricity Prices
For homeowners considering solar panel installation in Joliet, Illinois’ electricity-price trend offers useful context for weighing household energy options.
In the chart, Illinois’ average increased from 13.2 cents per kWh in 2021 to 15.9 in 2024. The U.S. average went from 13.7 to 16.5 cents. These are statewide and national, not Joliet-specific, averages.
A rooftop solar system can generate electricity at home, reducing how much a household needs to buy from the grid. Actual bill impacts depend on system size, sunlight, energy use, utility rates, and applicable compensation rules.
Over the long term, solar may help limit exposure to future utility-rate changes by supplying some power from the home’s system. Its value depends on production, upkeep, equipment life, and how local rates and policies evolve.
Price of Energy: Illinois vs National Average
Joliet Area Utility Providers
In Joliet, ComEd is the utility represented in the available local data. Its 2023 electricity price was 14.8¢ per kWh; 2023 is the latest year available because 2024 utility data is not yet available.
ComEd’s 2023 rate was below Illinois’s 15.70¢ per kWh average and the national average of 16.0¢. These figures show a price difference, but the supplied data does not explain its causes.
For Joliet households, solar can provide an alternative source of some electricity and may reduce reliance on grid purchases. Its value depends on household usage and system performance, not these averages alone.
Joliet Utilities Electricity Rates
Illinois Solar Incentives
Joliet residents may find state and utility programs that help offset solar costs. Review solar incentives in Illinois to see options that may apply.
Options include REC-contract value through Illinois Shines; income-qualified Illinois Solar for All; ComEd or Ameren solar and battery rebates; and an alternate property-tax valuation process for eligible systems.
With a LightReach lease, Palmetto handles the commercial ITC and passes savings through lower monthly payments; contract terms explain how this works.
| Incentive | Type | Description | Source |
|---|---|---|---|
| Illinois Shines (Adjustable Block Program) | Solar renewable energy credit (REC) incentive | Qualifying Illinois rooftop-solar and community-solar projects can earn REC-contract value, which may reduce a customer’s project cost or be passed through according to the customer’s contract. | Learn More |
| Illinois Solar for All (ILSFA) | Income-qualified solar incentive | Eligible households and certain nonprofits and public facilities can access qualifying solar or community solar with reduced or no upfront costs and required bill-savings protections. | Learn More |
| ComEd Distributed Generation Rebate | Utility solar rebate | Eligible ComEd residential and small-load customers may receive a rebate of $300 per kW for qualifying customer-owned renewable generation equipment. | Learn More |
| ComEd Residential Battery Storage Rebate | Utility battery storage rebate | Eligible ComEd residential customers may receive $300 per kWh of qualifying battery storage capacity, subject to utility program and tariff requirements. | Learn More |
| Illinois Solar Energy System Property-Tax Valuation | Property-tax valuation provision | Eligible Illinois solar-energy-system improvements may use an alternate property-tax valuation process, which can limit how the system’s value is reflected in an assessment but is not an automatic tax exemption. | Learn More |
Illinois Shines supports qualifying on-site solar and community-solar projects by contracting for the renewable energy credits (RECs) the systems are expected to produce. For 2026–27, the published REC prices for small distributed-generation projects up to 10 kW AC are $70.37 per REC in Group A and $80.77 per REC in Group B; eligible customer-owned small systems that do not receive a federal clean-energy credit may qualify for an additional $20 per REC. A REC represents 1 MWh of generation, so the total value depends on estimated production, location, project category, and program rules—not simply system size.
The REC payment is made to the Approved Vendor, not automatically as a household rebate. The customer’s purchase, lease, or power-purchase agreement determines whether and how much value reaches the customer; review the Illinois Shines disclosure and contract before signing. Capacity and waitlist status can change, and qualifying small-system contracts approved on or after June 1, 2026 pay 50% at energization with the remainder paid over the following six years.
Illinois Solar for All uses REC contracts with approved project vendors to make solar more affordable for eligible participants. For qualifying residential rooftop projects, the program is structured to offer no upfront cost for many 1–4-unit homes, while other eligible properties may receive low- or no-upfront-cost offers; community-solar subscriptions are also available. The customer benefit is the project pricing and required savings protections, not a standard cash payment to every household.
Residential and community-solar household eligibility is generally based on gross income at or below 80% of Area Median Income, adjusted for household size and location. Program requirements, including savings, maintenance, and warranty protections, apply, and funding and application windows are limited. Confirm current eligibility and availability through the program before relying on an offer.
ComEd’s published rebate materials list a $300-per-kW rebate for qualifying residential and small-load customer-owned renewable generation. The rebate can lower the net upfront cost of an eligible solar installation, but the amount is based on qualifying system capacity and program rules; it is not a universal payment for every solar system.
Equipment, smart-inverter, interconnection, customer-class, and tariff requirements apply. If you are on legacy full-retail net metering, taking a generation rebate may affect your delivery-service credits or legacy billing status under the applicable utility rules. Confirm the current rebate terms and the effect on your specific net-metering arrangement with ComEd in writing before applying.
ComEd’s published program materials list a storage rebate of $300 per kWh for eligible residential and small-load customers. The rebate can reduce the cost of a qualifying battery, with the payment determined by eligible storage capacity and the program’s terms. ComEd’s materials specify hourly supply service (BESH) for the residential storage rebate.
Eligible equipment, smart-inverter, customer-class, and tariff requirements apply; verify whether the battery must be paired with or charged by an on-site renewable generator under the current terms. Storage receiving a rebate on or after June 1, 2026 may also be subject to scheduled-dispatch requirements, with ComEd’s filed rider indicating service may begin no later than March 1, 2027. Confirm the obligation and any compensation with ComEd before applying.
Illinois law provides an alternate valuation process for eligible solar-energy-system improvements. A property owner may file a claim with the county chief assessment officer; depending on the system, property, and applicable assessment rules, the process can affect the assessed value used to calculate property taxes and may reduce the tax impact compared with ordinary valuation.
This is not a blanket exemption from property taxes and does not guarantee a particular dollar savings. Eligibility and the valuation calculation depend on the property and system, and the owner must follow the applicable filing process. Contact the county assessor and review the Illinois Department of Revenue guidance to determine whether your installation qualifies.
Ready to start saving with solar?
Speak with a Palmetto solar expert to find out exactly how much you can save with Illinois incentives.
Get a Free QuoteJoliet Solar Irradiance
Solar panel production varies throughout the year based on daylight hours, weather patterns, and sun intensity. Understanding how seasons affect your solar system helps set realistic expectations for your investment.
Joliet’s output varies with winter’s shorter days and lower sun angle, plus clouds and snow; longer summer days help. With proper design, solar can work well despite weather anecdotes.
Solar Production in Joliet by Month
What Can Your Solar System Power?
Summer Production (July)
In July, your 10 kW system could power:
- 3.6 average homes (15 kWh/day per home)
- or Run central AC for 18 hours AND power all other appliances
- or Fully charge 5.4 Tesla Model 3 electric vehicles
Winter Production (December)
In December, your 10 kW system could power:
- 2 average homes (15 kWh/day per home)
- or Keep your home heating system running for 15 hours
- or Fully charge 3 Tesla Model 3 electric vehicles
Annual Production
Over a year, your 10 kW system could:
- Offset 10 tons of carbon dioxide emissions
- or Equal the environmental benefit of planting 175 trees
- or Save approximately $4,234 in electricity costs
Want to know exactly how much solar can power your home?
Get a personalized solar analysis based on your actual home, energy usage, and roof characteristics.
Get My Custom EstimateSolar Panel Systems in Joliet
We organized address-level solar installation data from across the country and are excited to share this interactive map of Joliet. Click a hexagon to see the number of installations in that area and explore how neighbors across Joliet and nearby communities are making the switch to solar.
How to Choose a Solar Installer in Joliet
Verify the license
Illinois does not have a general state contractor license. Instead, the Illinois Commerce Commission (ICC) requires certification before covered distributed-generation installation work. That generally means completing the electrical wiring and connections needed to connect the system to the utility distribution system; planning or project management alone is not covered, so ask exactly who will perform each part of the work. Check the contractor’s status through the ICC distributed-generation installer page. Roofing work may separately require an IDFPR roofing-contractor license, depending on the scope.
Look for certified installers
Ask who will supervise and perform the installation, and whether that person holds a NABCEP certification. Learn about credentials through NABCEP, and ask the installer what a particular credential covers. Manufacturer certifications may be relevant to the specific equipment in your quote; ask which products they apply to and how to confirm them. These credentials are useful comparison points, not a substitute for any ICC certification required for the work.
Compare quotes the same way
Request written proposals based on the same home, usage assumptions, and system scope. Compare:
- System size in kilowatts (kW) and total price, plus price per watt.
- Panel and inverter brands and models.
- Estimated production in kilowatt-hours per year (kWh/year), and the assumptions behind each estimate.
- Warranty terms for panel product and performance, inverter, workmanship, and roof penetrations.
- Who handles permits and utility interconnection, and whether those tasks are included in the quote.
- Total cost or monthly payment, including any payment escalator and the terms that affect the amount over time.
Permits, interconnection and your HOA
For privately funded residential work, your local unit of government handles required plan review, permits, and inspections; requirements vary by location. The homeowner or installer applies to the electric distribution company (EDC) serving the property. Depending on where you live, that may be Commonwealth Edison Co, Ameren Illinois Company, MidAmerican Energy Co, or City of Springfield – (IL). Ask who submits the interconnection request and tracks it through review.
Illinois’ Homeowners’ Energy Policy Statement Act says an association may not prohibit or effectively prohibit a solar energy system. HOAs may set certain design and configuration requirements, but those requirements may not reduce estimated annual production by more than 10%. Ask your installer to help document any proposed design and its production estimate.
Red flags
- Pressure to sign the same day or before you have time to compare written quotes.
- An installer who cannot identify the crews doing the work or explain their credentials, including for out-of-state crews.
- A production estimate with no clear system details or assumptions.
- A large upfront deposit without a clear explanation of what it covers and when payments are due.
- Promises of homeowner federal tax credits for purchases in 2026; those credits ended December 31, 2025.
If you have a complaint about home-improvement work, contractor conduct, or solar sales, contact the Illinois Attorney General’s Consumer Protection Division. For a complaint specifically about ICC Part 468 certification or compliance, the ICC has a complaint procedure.
Leasing Solar Panels
For Joliet homes served by ComEd, Palmetto lists a solar power purchase agreement (PPA) as available. Availability can depend on your address and project eligibility; other Illinois utilities may have different options.
With a PPA, you pay for the electricity the system produces at a set price per kilowatt-hour, rather than buying panels outright. Payments can vary by season as production changes. Learn about buying versus leasing solar and how a PPA compares.
Compared with paying cash, a PPA can avoid the large upfront system purchase. The provider typically owns and maintains the equipment under the agreement, so you don’t take on the same repair and upkeep responsibilities as a system owner. Review contract terms, including maintenance, pricing, and production protections. See LightReach details.
Go solar without the investment
With LightReach, there are no investment costs to recoup, loan payments to manage, or maintenance needs to take on. As soon as your panels are active, your solar savings are too!
Explore LightReach LeasingFrequently Asked Questions
Yes. Joliet residents served by ComEd can receive credits for excess electricity their solar panels send to the grid. The credit depends on when the system received permission to operate (PTO).
Systems with PTO before January 1, 2025 generally receive 1:1 retail-rate net-metering credits. For systems with PTO on or after that date, exported power is credited at ComEd’s Price to Compare supply and transmission rates, not delivery charges, taxes, or customer charges. Remaining credits roll over indefinitely for eligible charges. Check your ComEd bill or account to confirm your utility and applicable terms.
Yes, owned solar panels may increase a home’s resale value in Joliet. A Zillow study found homes with solar panels sold for about 4.1% more on average. That national finding is not a guaranteed premium for every Joliet home; actual value depends on the system and local market.
This potential value applies to a system the homeowner owns, such as one purchased—not leased or third-party-owned (TPO) equipment. With a lease or PPA, a buyer may need to assume the agreement, which can affect resale differently.
In Joliet, homeowners can go solar with a LightReach lease for a low fixed monthly payment and no upfront cost. The calculator above estimates $79 per month for a medium home; payment estimates vary by home size.
Cash purchase is another option: the calculator estimates $28,095 for a medium home, with specific pricing shown above. The federal 30% tax credit is no longer available for residential cash purchases following the 2025 federal law change.
In Joliet, a typical 9.84 kW LightReach solar lease is estimated at $79 per month, using Illinois’ 1,134 kWh/kW annual production ratio and a $0.085/kWh rate. Actual payments depend on the home and agreement.
There is no upfront cost. Palmetto owns the system, and one monthly payment covers panels, installation, monitoring, maintenance, and protection, including a 90% Production Guarantee. Because lease payments are typically below current electricity bills, savings can start when the system operates; actual bills and savings vary.
Palmetto Solar is a solar installation option for Joliet homeowners. We have completed 9,050 installations across Illinois since 2020 and work with an installation network to serve local projects.
We offer several financing options. To decide what fits your Joliet home, compare system design, total cost, financing terms, warranties, and how the system may work with your ComEd service and electricity use.
Yes. Solar panels work in Joliet’s climate. The article estimates Illinois averages about 4.6 peak sun hours per day. Panels also produce electricity on cloudy days, though less than in direct sun.
Production changes by season: Joliet’s longer summer days support more output, while winter’s shorter days, lower sun angle, clouds, and snow can reduce it. Snow covering panels may temporarily limit generation.
Solar panels are low-maintenance. In Joliet, rain usually washes away everyday dust, but snow or debris can temporarily reduce production. Monitor system output and arrange service if it drops unexpectedly or equipment is damaged.
With LightReach, Palmetto owns the system and handles maintenance, monitoring, and repairs at no extra cost. The agreement includes a 90% Production Guarantee.